Examine source code of Enhanced Plex

{
  "manifest_version": 3,
  "name": "Enhanced Plex",
  "description": "Adds several features to the Plex/Web client for Plex",
  "version": "4.0.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "@EnhancedPlex.Balthier",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "usage": "analytics",
        "personal_data": false
      }
    }
  },
  "options_page": "resources/extras/options.html",
  "content_scripts": [
    {
      "matches": [
        "*://app.plex.tv/desktop*",
        "*://127.0.0.1/web*",
        "*://localhost/web*"
      ],
      "run_at": "document_idle",
      "css": [
        "css/enhancedplex.css"
      ],
      "js": [
        "js/utils.js",
        "js/plugins.js",
        "apis/trakt_api.js",
        "apis/sonarr_api.js",
        "apis/radarr_api.js",
        "apis/google_api.js",
        "plugins/imdb.js",
        "plugins/missing_episodes.js",
        "plugins/tmdb.js",
        "plugins/trakt.js",
        "plugins/tvdb.js",
        "plugins/sonarr.js",
        "plugins/radarr.js",
        "js/main.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/utils.js",
      "apis/google_api.js",
      "js/service_worker.js"
    ]
  },
  "permissions": [
    "storage"
  ],
  "icons": {
    "16": "resources/icon16.png",
    "48": "resources/icon48.png",
    "128": "resources/icon128.png"
  },
  "host_permissions": [
    "https://api.trakt.tv/*",
    "https://app.plex.tv/*",
    "https://plex.tv/*",
    "https://www.google-analytics.com/*",
    "*://localhost/*",
    "*://127.0.0.1/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "resources/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}